Course (architecture) in the context of "Concrete masonry unit"

Rubble masonry or rubble stone is rough, uneven building stone not laid in regular courses. It may form an outer surface of a wall, or fill the core of a wall which is faced with unit masonry such as brick or ashlar. Some medieval cathedral walls have outer shells of ashlar with an inner backfill of mortarless rubble and dirt.

Brickwork is masonry produced by a bricklayer, using bricks and mortar. Typically, rows of bricks called courses are laid on top of one another to build up a structure such as a brick wall.

Bricks may be differentiated from blocks by size. For example, in the UK a brick is defined as a unit having dimensions less than 337.5 mm × 225 mm × 112.5 mm (13.3 in × 8.9 in × 4.4 in) and a block is defined as a unit having one or more dimensions greater than the largest possible brick.

Ashlar (/ˈæʃlər/) is a term used to describe cut and dressed stone worked to achieve a specific form, typically rectangular; a structure built from such stones; and the look created by the dressing technique. Ashlar stone may be dry laid or bedded in mortar.

Flemish bond is a pattern of brickwork that is a common feature in Georgian architecture. The pattern features bricks laid lengthwise (stretchers) alternating with bricks laid with their shorter ends exposed (headers) within the same courses. This decorative pattern can be accented by glazing or burning the exposed ends of the headers so that they possess a dark, glassy surface that contrasts with the stretchers. Despite the bond's name, the pattern did not originate in Flanders and can be found in European architecture dating to the late Middle Ages.

The pattern became popular among prestigious architectural projects in 17th-century England before spreading to British colonies in North America where it became closely associated with colonial Georgian architecture, especially in Virginia and Pennsylvania. With the early 20th-century restoration project at Colonial Williamsburg, the pattern experienced renewed popularity in the United States.

The Western Wall (Hebrew: הַכּוֹתֶל הַמַּעֲרָבִי, romanized: HaKotel HaMa'aravi, lit. 'the western wall'; pronunciation; Ashkenazi Hebrew pronunciation: HaKosel HaMa'arovi) is an ancient retaining wall of the built-up hill known to Jews and Christians as the Temple Mount of Jerusalem. Its most famous section, known by the same name, often shortened by Jews to the Kotel or Kosel, is known in the West as the Wailing Wall, and in Arab world and Islamic world as the Buraq Wall (Arabic: حَائِط ٱلْبُرَاق, romanized: Ḥā'iṭ al-Burāq; ['ħaːʔɪtˤ albʊ'raːq]). In a Jewish religious context, the term Western Wall and its variations is used in the narrow sense, for the section used for Jewish prayer; in its broader sense it refers to the entire 488-metre-long (1,601 ft) retaining wall on the western side of the Temple Mount.

At the prayer section, just over half the wall's total height, including its 17 courses located below street level, dates from the end of the Second Temple period, and is believed to have been begun by Herod the Great. The very large stone blocks of the lower courses are Herodian, the courses of medium-sized stones above them were added during the Umayyad period, while the small stones of the uppermost courses are of more recent date, especially from the Ottoman period.